//
// Created by zhuyijun on 2021/9/14.
//

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <typeinfo>
using namespace std;

class Grand {
private:
    int hold;
public:
    Grand(int h = 0) : hold(h) {}

    virtual void Speak() const {
        cout << "I am a grand class!\n";
    }

    virtual int Value() const {
        return hold;
    }
};

class Superb : public Grand {
public:
    Superb(int h = 0) : Grand(h) {}

    void Speak() const {
        cout << "I am a superb class!!\n";
    }

    virtual void Say() const {
        cout << "I hold the superb value of" << Value() << "!\n";
    }
};

class Magnificent : public Superb {
private:
    char ch;
public:
    Magnificent(int h = 0, char c = 'A') : Superb(h), ch(c) {}

    void Speak() const {
        cout << "I am a magnificent class!!\n";
    }

    void Say() const {
        cout << "I hold the character " << ch << " and the integer " << Value() << "!\n";
    }
};

Grand *GetOne();

int main() {

    srand(time(0));
    Grand *pg;
    Superb *ps;
    for (int i = 0; i < 5; ++i) {
        pg = GetOne();
        cout <<"Now processing type "<< typeid(*pg).name() <<".\n";
        pg->Speak();
        if ((ps = dynamic_cast<Superb *>(pg))) {
            ps->Say();
        }
        if (typeid(Magnificent) == typeid(*pg)){
            cout <<"Yes, you're really magnificent.\n";
        }
    }
    return 0;
}

Grand *GetOne() {
    Grand *p;
    switch (rand() % 3) {
        case 0:
            p = new Grand(rand() % 100);
            break;
        case 1:
            p = new Superb(rand() % 100);
            break;
        case 2:
            p = new Magnificent(rand() % 100, 'A' + rand() % 26);
            break;
    }
    return p;
}